function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brandão, Simone N. & Saeedi, Hanieh & Brandt, Angelika', 1],
    ['Chavtur, Vladimir G.', 3],
    ['Churchill, Celia K. C. & Ellis, Emily A. & Pique, Alannah E.', 4],
    ['Karanovic, I.', 3],
    ['Karanovic, Ivana & Soh, Ho-Young', 5],
    ['Kornicker, Louis S. & Iliffe, Thomas M.', 13],
    ['Perez-Gelabert, Daniel E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);